Some performance improvements.

[rustbasic]

Close #4022

Some performance improvements.

[emilk]

Please elaborate on what is happening here

[rustbasic]

@emilk

It's done up to this point.

There are no special bugs.
If you look at the source code, there is no special change from the original intention.

This is what everyone originally intended, and it eliminates commonly used bottlenecks and improves some subtle performance.
It may be difficult to notice performance improvements in simple programs, but performance has improved.

[rustbasic]

@emilk

Close #4022

I think issue #4022 can be closed.
FPS is relatively improved at around 40-50.

Reducing FPS from 60 to 50 when creating a viewport is a separate issue.
I think it would be best to end here for now.

Not directly related to this, but influencing,
#4053 FontBook (bulk widget) issue still remains.